No grenades kind of mitigates that, though you are heavily encourage to lay down way more mines and there are some pretty heavy munitions sink abilities in commanders.
I'd say Soviets are less muni heavy if you're lazy with mines and just as muni heavy if you plant enough mines.
Molitovs and oorah both cost 20mu per now so while they don't have nades, even using orrah to try and get decent positioning or throw an at nade will easily put you into the range of nade usage.
When soviet floated munitions oorah was cheaper, Molitovs were cheaper, cons didn't have an upgrade, penals didn't have an upgrade, SU76 barrage was free, mortars didn't have flares, maxim didn't have a munitions cost, penals didn't have any use at all let alone the AT package (they did have the flamer but as I said penals rotted in a gulag never seeing a fight so it's less relevant)
Soviet munitions consumption has gone through the roof and they have not been a munitions float faction in a good while.
Earlier game when other factions are kitting out with lmgs and assault rifles at every chance they can that gives a direct feel of strain, soviet have opportunity costs to sway the moment instead of swaying henceforth.